Arsenic species in weathering mine tailings and biogenic solids at the Lava Cap Mine Superfund Site,Nevada City,CA |
| |
Authors: | Andrea L Foster Roger P Ashley James J Rytuba |
| |
Affiliation: | (1) U.S. Geological Survey, 345 Middlefield Rd, MS 901, 94025 Menlo Park, CA, USA |
| |
Abstract: | Background A realistic estimation of the health risk of human exposure to solid-phase arsenic (As) derived from historic mining operations is a major challenge to redevelopment of California's famed "Mother Lode" region. Arsenic, a known carcinogen, occurs in multiple solid forms that vary in bioaccessibility. X-ray absorption fine-structure spectroscopy (XAFS) was used to identify and quantify the forms of As in mine wastes and biogenic solids at the Lava Cap Mine Superfund (LCMS) site, a historic "Mother Lode" gold mine. Principal component analysis (PCA) was used to assess variance within water chemistry, solids chemistry, and XAFS spectral datasets. Linear combination, least-squares fits constrained in part by PCA results were then used to quantify arsenic speciation in XAFS spectra of tailings and biogenic solids. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|